DaVoice Sues Perplexity AI Over Alleged Theft of Wake Word Technology Trade Secrets

DaVoice Files Trade Secrets Lawsuit Against Perplexity AI

Startup DaVoice has initiated legal action against Perplexity AI in California federal court, filing case No. 3:26-cv-10909 in the US District Court for the Northern District of California on Thursday1

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. The Perplexity AI lawsuit centers on allegations that the company stole trade secrets related to wake word technology for AI assistants, marking another chapter in the evolving landscape of AI-related intellectual property law. DaVoice, represented by attorneys Davida Brook and Ian Crosby of Susman Godfrey, claims Perplexity misappropriated confidential information following a business collaboration between the two entities1

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Allegations of Stolen Proprietary Technology

The heavily redacted complaint alleges that DaVoice sues Perplexity AI for stealing proprietary technology after the companies worked together on unspecified projects2

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. According to the filing, Perplexity stole proprietary trade secrets that included DaVoice's source code, inference logic, network architecture, training approaches, training data, and specialized know-how2

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. The complaint states that technology was "built with DaVoice's proprietary" components, suggesting a deep integration of the startup's innovations into collaborative work that allegedly became the foundation for Perplexity's subsequent development2

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Understanding Wake Word Detection Technology

DaVoice specializes in wake word detection technology that enables devices to continuously listen for specific activation phrases2

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. This wake word technology allows AI assistants and smart devices to remain in a low-power listening state until users speak predetermined commands to activate full functionality. The startup has established partnerships with major companies including Volkswagen and internet-of-things company Samsara, demonstrating the commercial viability and industry adoption of its proprietary systems2

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. Watch for how this case might influence collaboration agreements between AI startups and larger technology companies, particularly regarding intellectual property protections during joint development efforts.

Perplexity Responds to Allegations

A Perplexity spokesperson issued a statement Friday dismissing the lawsuit as a baseless attempt to claim ownership of standard wake-word technology3

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. The AI-powered search engine company asserts that the agreement between the parties expressly protects Perplexity's right to develop its own similar, equal or competitive products or services3

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. This defense suggests Perplexity will argue that contractual provisions allowed independent development of comparable technology. Perplexity, known for its AI-powered search engine technology and recently launched Comet browser and AI assistant, maintains that its development work falls within permitted boundaries2

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. Representatives and legal counsel for DaVoice did not respond to requests for comment on the matter3

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Implications for AI Industry Collaborations

This case matters because it highlights the tension between collaborative innovation and intellectual property protection in the rapidly evolving AI sector. As companies increasingly partner to accelerate development, defining boundaries around confidential information and derivative works becomes critical. The lawsuit raises questions about what constitutes permissible independent development versus misappropriation when companies have worked closely together. Short-term, expect increased scrutiny of collaboration agreements and potentially more restrictive terms in AI partnerships. Long-term, the outcome could establish precedents for how courts evaluate trade secret claims involving complex AI systems where training data, network architecture, and inference logic form the competitive advantage. Industry observers should monitor whether this case prompts startups to reconsider partnership strategies with larger AI companies or leads to more robust legal frameworks governing joint development in artificial intelligence.